QA401 measurement question

Discussion in 'Test & Measurement Forum' started by coinmaster, Feb 8, 2018.

  1. coinmaster

    Thread Starter Member

    Dec 24, 2015
    492
    8
    I just received a QA401 and I have a question about the result of the measurement I'm getting
    [​IMG]
    I don't understand why the fundamental frequency is so far below 0db, this is giving me a false distortion reading as well.
     
  2. AlbertHall

    AAC Fanatic!

    Jun 4, 2014
    6,182
    1,442
    What is the input voltage?
    What is the input attenuator set to?
     
  3. ebeowulf17

    Well-Known Member

    Aug 12, 2014
    2,264
    388
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